US5196816A - Polarized reversible magnet - Google Patents

Polarized reversible magnet Download PDF

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Publication number
US5196816A
US5196816A US07/857,196 US85719692A US5196816A US 5196816 A US5196816 A US 5196816A US 85719692 A US85719692 A US 85719692A US 5196816 A US5196816 A US 5196816A
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US
United States
Prior art keywords
coil former
polarized
yoke
permanent magnets
upper flange
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/857,196
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English (en)
Inventor
Dietmar Harting
Ernst-Heinrich Hartung
Joachim Brendel
Wilhelm Niermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harting Electronics GmbH and Co KG
Original Assignee
Harting Electronics GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Harting Electronics GmbH and Co KG filed Critical Harting Electronics GmbH and Co KG
Assigned to HARTING ELEKTRONIK GMBH reassignment HARTING ELEKTRONIK GMBH ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BRENDEL, JOACHIM, HARTING, ERNST-HEINRICH, NIERMANN, WILHELM, HARTING, DIETMAR
Application granted granted Critical
Publication of US5196816A publication Critical patent/US5196816A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F13/00—Apparatus or processes for magnetising or demagnetising
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H01H51/2236—Polarised relays comprising pivotable armature, pivoting at extremity or bending point of armature
    • H01H51/2245—Armature inside coil
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/14—Pivoting armatures

Definitions

  • the invention relates to a polarized, reversible magnet with an essentially U-shaped yoke, in which a coil former is inserted, with an armature, which passes through the coil former and which can be moved between two pole pieces about an axis facing the yoke bottom, permanent magnets being disposed in the course of the flux of the yoke legs/pole pieces.
  • Such polarized magnetic systems find use for the magneto-magnetic storage of the end positions of the armature.
  • the permanent magnets must be disposed in the course of the flux of the yoke legs of the magnetic system in order to achieve a permanent magnetic holding force in the end position of the armature.
  • an electric coil is required, which, when supplied with an appropriate current, produces an electromagnetic force, which opposes the respective holding force and brings about a movement of the armature into the other end position.
  • Polarized magnetic systems for which an electric coil is disposed in a U-shaped yoke of a magnet, the armature being provided at its end, which is facing the bottom of the yoke, with an axis, which is held in a recess of a magnetically conductive metal plate that is disposed between the bottom of the yoke and the underside of the coil former.
  • the permanent magnet which is required for producing the permanent magnetic force, is inserted between the one longitudinal leg of the U-shaped magnetic yoke and the leg, which is offset 90° to the one pole leg, while the other pole leg is fastened, for example, without interpositioning of a permanent magnet, directly to the other longitudinal leg of the U-shaped yoke of the magnet.
  • the individual parts of this magnetic system including the coil former but with the exception of the armature that is moveable on the armature axis, are connected to one another and secured in position by adhesive bonds.
  • a plurality of individual parts is required, which additionally must be glued together after they are assembled mechanically.
  • extensive and complicated devices are required, which guarantee these values after the gluing procedure, since, for practical purposes, a correction is no longer possible once the adhesive has cured.
  • a polarized magnetic system is disclosed in the German offenlegungsschrift 34 18 471.
  • a holding frame overlapping the outer sides of the yoke leg, is provided for mounting the individual parts of the system.
  • the holding frame is provided with guiding mechanisms, with which it can be slipped onto the magnetic system so as to fit precisely.
  • relatively expensive adjusting work is, however, always still required during the assembly.
  • the use of an additional holding frame increases the manufacturing costs.
  • the coil former can be pushed with positive engagement into the U-shaped yoke, the lower coil former flange being provided with integral moldings, which engage recesses in or at the bottom of the yoke, that the upper coil former flange is constructed in the form of a frame and has recesses, which are engaged by the upper ends of the yoke legs, and that the bent pole pieces and the permanent magnets can be pushed through openings in the upper coil former flange into the magnetic system, stops at the coil former flange limiting the depth of penetration of the pole pieces.
  • the complete magnetic system consists of a few individual parts, which are easily assembled, the assembly being accomplished by a simple assembling of the individual parts.
  • Appropriate stops to the insertion of the pole pieces guarantee that the specified working air gap of the magnetic system is always achieved accurately without having to carry out additional adjusting work or use sensing or measuring gauges or other aids.
  • FIG. 1 shows a sectional view of a reversible magnet
  • FIG. 2 shows the side, semi-sectional view of the reversible magnet of FIG. 1;
  • FIG. 3 shows the plan, semi-sectional view of the reversible magnet of FIG. 1;
  • FIG. 4 shows a view of the reversible magnet of FIG. 1 from below;
  • FIG. 5 shows a view of a coil former
  • FIG. 6 shows a side view from the left of the coil former of FIG. 5;
  • FIG. 7 shows a side view from the right of the coil former of FIG. 5;
  • FIG. 8 shows a view of the coil former of FIG. 5 from below
  • FIG. 9 shows a plan view of the coil former of FIG. 5;
  • FIG. 10 shows a view of a yoke for the reversible magnet
  • FIG. 11 shows a side view of the yoke of FIG. 10
  • FIG. 12 shows a view of the yoke of FIG. 10 from below.
  • FIG. 13 shows a view of the mounting plate.
  • the polarized, reversible magnet shown in FIGS. 1 to 4, consists essentially of a U-shaped yoke 1, a coil former 2 with an excitation winding 3, two pole pieces 4, 4', two permanent magnets 5, 5', as well as an armature 6.
  • the armature 6 is mounted in the lower part of the coil former by means of an axis 7 and is provided with tap 8, which is integrally molded at the upper end of the armature, for example, as a plastic part. Lateral surfaces 9 of this part serve for the lateral guidance of the armature in the region of the upper coil former flange.
  • the coil former 2 which is shown in different view in FIGS. 5 to 9, has a rectangular, tubular, middle part 10 as support for the excitation winding, as well as an upper flange 11 and a lower flange 12.
  • An essentially rectangular recess 13 intersperses the whole of the coil former in its longitudinal direction.
  • the upper flange 11 is provided with two lateral, essentially rectangular openings 14, which change over in each case into two lateral, narrow recesses 15.
  • openings 14 and a region 17, recessed with respect to the flange surface are provided in the flange 11 towards the center of the coil former.
  • the lower flange 12 is provided with a box-shaped recess 18.
  • a narrow, downwardly protruding integral molding 19 is formed at the side.
  • laterally holding lugs 20 are integrally molded, into the openings 21 of which the bearing pivot 7 is pushed during installation of the magnets.
  • a hole 22 at the side makes it possible to push in the bearing pivot which is disposed within the box-shaped depression 18 after the installation.
  • the yoke 1 of the reversible magnet is shown in different views.
  • the yoke consists of a sheet metal part, which is bent in the shape of a U, the two legs 23 of the yoke being formed during the bending process.
  • two tabs 24, which are spaced apart and are bent at right angles towards the inside of the yoke, are integrally molded at the front face.
  • the tabs are provided with bevels 25 and, adjoining these, latches 26.
  • the bottom 27 of the yoke finally has a central, rectangular opening 28, as well as two narrow, lateral moldings 29. Moreover,
  • a mounting plate 30 is shown in FIG. 13. It has a central recess 31, which is such that, when the mounting plate 30 is placed in the box-shaped depression 18 of the lower flange 12 of the spool former, it encompasses the holding lugs 20 as well as the armature that is inserted in the magnetic system.
  • the thickness of the mounting plate is dimensioned to correspond to the depth of the depression 18.
  • the armature 6 is pushed from above in the continuous recess 13, until the bore of the bearing 32 of the armature 6 is aligned with the openings 21 of the holding lugs 20. Subsequently, the bearing pivot 7 is pushed in from the side through the holding lugs into the bore of the bearing.
  • the bearing in the armature 6 can optionally be provided with a bearing bush 33, which has shoulders 34 that protrude over the armature. These shoulders, the lateral surfaces of which are relatively small, serve for centering and for decreasing the friction between the holding lugs or the side walls of the recess 13 in the coil former and the armature.
  • the mounting plate 30 is placed in the box-shaped depression 18 of the lower coil former flange 12, the lower end of the armature and the holding lugs 20 together with the bearing pivot 7 being accommodated in the recess 31 of the mounting plate.
  • the mounting plate serves, on the one hand, to improve the introduction of the magnetic flux between the armature and the bottom of the yoke and, on the other, to secure the axial position of the bearing axis.
  • the subassembly, so pre-assembled, is then pushed into the U-shaped yoke 1, the tabs 24 at the upper ends of the yoke legs 23 dipping into the recesses 15 of the upper coil former flange and being locked here by means of the latches 26 behind appropriate shoulders of the coil former flange.
  • the tabs 24 are provided with bevels 25, so that they can be pushed more easily into the respective recesses of the coil former flange.
  • the lower coil former flange 12 is held laterally guided by means of the integral moldings 19, which engage corresponding moldings 29 in or on the bottom 27 of the yoke.
  • the moldings 19 can also be provided with locking means, which interlock with the bottom of the yoke and cause the coil former and the yoke to be held together firmly. In this case, it is then possible to do without the latches 26 at the tabs 24 of the yoke legs.
  • the permanent magnets 5, 5' are pushed through the openings 14 of the upper coil former flange 11 into the magnetic system so as to lie against the inner sides of the yoke legs, until they are fixed in position by the inwardly protruding limiting burls 35. Lateral holding burls 36 serve as additional centering aides for the pushing in of the permanent magnets.
  • the bent pole pieces 4, 4' are then pushed through the openings 14 of the upper coil former flange 11, until the 90° offset part of the pole pieces lies on stops or stop shoulders 16 formed by the depressed regions 17.
  • the appropriate dimensional coordination of the parts ensures that the working air gap between the armature and the pole pieces has a precisely predetermined size without having to use special aids such as gauges, etc.
  • the insertion of the upper ends of the pole legs (the tabs 24 into the recesses 15 in the upper coil former flange also accomplishes that, during the operation of the magnetic system, the yoke legs cannot be deflected to the outside, when the armature strikes the responsive pole piece.
  • the tabs 24, integrally molded to the front side of the yoke legs, preferably are disposed at such a distance from one another that, due to the bending at right angles, the permanent magnets can just be pushed between the tabs. At the same time, when they have been pushed in, the permanent magnets are precisely guided laterally.
  • the permanent magnets and the pole pieces preferably are narrower than the yoke legs 23, as a result of which a mutual interference of closely adjacent magnetic systems is largely prevented.
  • the pole pieces and the permanent magnets are secured in position by a few drops of a rapidly curing adhesive.
  • provisions can also be made to fill the cavities between the spool former, pole pieces, permanent magnets and yoke legs with a casting or sealing compound.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
  • Servomotors (AREA)
  • Dc Machiner (AREA)
US07/857,196 1991-04-04 1992-03-25 Polarized reversible magnet Expired - Fee Related US5196816A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4110815A DE4110815C2 (de) 1991-04-04 1991-04-04 Polarisierter umschlagmagnet
DE4110815 1991-04-04

Publications (1)

Publication Number Publication Date
US5196816A true US5196816A (en) 1993-03-23

Family

ID=6428764

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/857,196 Expired - Fee Related US5196816A (en) 1991-04-04 1992-03-25 Polarized reversible magnet

Country Status (6)

Country Link
US (1) US5196816A (enrdf_load_stackoverflow)
JP (1) JPH05114513A (enrdf_load_stackoverflow)
KR (1) KR920020541A (enrdf_load_stackoverflow)
DE (1) DE4110815C2 (enrdf_load_stackoverflow)
IT (1) IT1254840B (enrdf_load_stackoverflow)
TW (1) TW251395B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6652285B1 (en) * 1998-11-11 2003-11-25 Jarle Breivik System which can reversibly reproduce itself
US20140062628A1 (en) * 2012-08-28 2014-03-06 Eto Magnetic Gmbh Electromagnetic actuator device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9413305U1 (de) * 1994-08-17 1994-11-10 Petschar, Hans, 74251 Lehrensteinsfeld Elektro-Schwingmotor
DE19948207A1 (de) * 1999-10-07 2001-04-12 Heinz Leiber Elektromagnetischer Aktuator

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3987383A (en) * 1974-12-30 1976-10-19 Sds-Elektro Gmbh Electromagnetic switching device
US4419643A (en) * 1981-04-22 1983-12-06 Hosiden Electronics Co., Ltd. Self-sustaining solenoid

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1414819A1 (de) * 1961-03-13 1968-10-10 List Dipl Ing Heinrich Kleinstmagnet mit Permanentpol
CH500575A (de) * 1970-03-25 1970-12-15 Landis & Gyr Ag Bistabiles Magnetsystem für Wechselstrom
DE3044829A1 (de) * 1980-11-28 1982-07-01 Harting Elektronik Gmbh, 4992 Espelkamp Polarisiertes magnetsystem
DE3418471A1 (de) * 1984-05-18 1985-11-21 Harting Elektronik Gmbh, 4992 Espelkamp Polarisiertes magnetsystem
DE3437487A1 (de) * 1984-10-12 1986-04-17 H. Kuhnke Gmbh Kg, 2427 Malente Bistabiles magnetventil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3987383A (en) * 1974-12-30 1976-10-19 Sds-Elektro Gmbh Electromagnetic switching device
US4419643A (en) * 1981-04-22 1983-12-06 Hosiden Electronics Co., Ltd. Self-sustaining solenoid

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6652285B1 (en) * 1998-11-11 2003-11-25 Jarle Breivik System which can reversibly reproduce itself
US20140062628A1 (en) * 2012-08-28 2014-03-06 Eto Magnetic Gmbh Electromagnetic actuator device
US9607746B2 (en) * 2012-08-28 2017-03-28 Eto Magnetic Gmbh Electromagnetic actuator device

Also Published As

Publication number Publication date
IT1254840B (it) 1995-10-11
ITMI920691A1 (it) 1993-09-24
DE4110815A1 (de) 1992-10-08
JPH05114513A (ja) 1993-05-07
DE4110815C2 (de) 1993-11-04
ITMI920691A0 (it) 1992-03-24
JPH0586044B2 (enrdf_load_stackoverflow) 1993-12-09
KR920020541A (ko) 1992-11-21
TW251395B (enrdf_load_stackoverflow) 1995-07-11

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AS Assignment

Owner name: HARTING ELEKTRONIK GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:HARTING, DIETMAR;HARTING, ERNST-HEINRICH;BRENDEL, JOACHIM;AND OTHERS;REEL/FRAME:006065/0478;SIGNING DATES FROM 19920319 TO 19920320

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19970326

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362